GTAC Observation Log 1. Date : 21/12/2017 2. Observation Sr. No. : 9971 3. Observer : Robert Main, Dongzi Li, FangXi Lin, Nikhil Mahajan, Ue Li Pen, Keith Vanderlinde, Marten H vanKerkwijk, I-Sheng Yang 4. Observer's Email : main@astro.utoronto.ca, dzli@cita.utoronto.ca, flin@cita.utoronto.ca, mahajan@astro.utoronto.ca, pen@cita.utoronto.ca, vanderlinde@di.utoronto.ca, mhvk@astro.utoronto.ca, iyang@perimeterinstitute.ca 5. Project Name : Understanding the Extreme Lensing Events of the Black Widow`s radio eclipse 6. Project Code : 33_012 7. Operator(s) : Deepak, Nilesh, Shilpa 8. Command File : /odisk/gtac/cmd/33_012/obs.cmd 9. LTA File : /gsbifrdata1/21dec/33_012_21dec2017.lta, /gwbifrdata2/21dec/33_012_21dec2017.lta 10. LogFlag File : /odisk/online1/logflags/33_012.FLAGS.1 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 306 MHz ,RF2 : 306 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 255 MHz, ILO2 : 255MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 24+4 dB, 32 MHz,OFF, IF-CH2 : 24+4 dB, 32 MHz,OFF GSB SETTINGS : 14. GSB Host : gsbm1_lenyadri 15. GSB Mode : Realtime 16. GSB LTA : 8 17. GSB CTRL : ONLINE 18. GSB Fstop : ON 19. GAIN EQ : OFF 20. Stokes : Total_Intensity 21. Beam - 1 : OFF 22. Beam - 2 : Volt 23. ACQ BW : 33.333333 MHz 24. Final BW : 0 MHz; Step # 0 25. Maximum Channels : 256 26. Channel Numbers : 0:255:1 27. LO5 -1 : 149 28. LO5 -2 : 156 29. Frequency Parameters (TPA) : 306 306 255 255 51 51 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :26 32. Name of Non-Working Antennas (with reason for each) : C12 : Painting. E06 : Mechanical work. C09 : RFI. W05 : Feed jam. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 21 Dec 2017 09:00:00 - 21 Dec 2017 12:11:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :26 37. Comments (During Observations) : ------------GWB Setting---------------------------------------------------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 200.0000 GPU_FINAL_BW : 200.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 500 500 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 33_012 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : Voltage GPU_BEAM_2 : OFF GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 8 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : 64 inputs. GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF --------------------------------------------------------------------------- # GWB GAC configuration is as follows : # BEAM-1:130 :: C00 C01 C02 C03 C04 C05 C06 C08 C10 C11 C13 C14 E02 E03 S01 S02 W01 W02 Total=18 # BEAM-1:175 :: C00 C01 C02 C03 C04 C05 C06 C08 C10 C11 C13 C14 E02 E03 S01 S02 W01 W02 Total=18 --------------------------------------------------------------------------- # GSB GAC configuration is as follows : # BEAM-2:130 :: C00 C01 C02 C03 C04 C05 C06 C08 C10 C11 C13 C14 E02 E03 S01 S02 W01 W02 Total=18 # BEAM-2:175 :: C00 C01 C02 C03 C04 C05 C06 C08 C10 C11 C13 C14 E02 E03 S01 S02 W01 W02 Total=18 --------------------------------------------------------------------------- 09:00 : Started settings. 09:30 : Power equalized on 1859+129 @ 250 counts for GSB and 150 counts for GWB. 09:45 : Phasing done on 1859+129. 09:49 : Started scan on B1957+20 for ~ 26.5751 min. 10:21 : Phasing done on 1859+129. 10:22 : Started scan on B1957+20 for ~ 25.2329 min. 10:53 : Phasing done on 1859+129. 10:54 : Started scan on B1957+20 for ~ 25.5013 min. 11:28 : Phasing done on 1859+129. 11:29 : Started scan on B1957+20 for ~ 33.0175 min. 12:04 : Started scan on 1859+129 for ~ 6.44244 min. 12:11 : Stopped scan and observing session over.